TiO2-graphene nanocomposite supported on floating autoclaved cellular concrete for photocatalytic removal of organic compounds

被引：24

作者：

Suave, Jaqueline ^{[1
]}

Amorim, Suelen M. ^{[1
]}

Moreira, Regina F. P. M. ^{[1
]}

机构：

[1] Univ Fed Santa Catarina, Dept Chem Engn & Food Engn, Campus Univ, BR-88040900 Florianopolis, SC, Brazil

来源：

JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING | 2017年 / 5卷 / 04期

关键词：

TiO2-graphene nanocomposites; Autoclaved cellular concrete; Heterogeneous photocatalysis; Methylene blue; Methyl orange; Ketoprofen; GRAPHENE OXIDE NANOCOMPOSITES; SOLVOTHERMAL SYNTHESIS; HIGH-PERFORMANCE; HYBRID MATERIALS; TIO2; DEGRADATION; COMPOSITE; PHOTODEGRADATION; FABRICATION; DYES;

D O I：

10.1016/j.jece.2017.06.028

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Photocatalytic titanium dioxide (TiO2) nanocomposites with different loads of ozonated graphene (OGn) were prepared and evaluated in the photocatalytic degradation of methylene blue, methyl orange and ketoprofen using UVC irradiation. The nanocomposites were characterized by field emission gun scanning electron microscopy (FEG-SEM), Raman spectroscopy, X-ray diffraction (XRD) and thermogravimetric analysis (TGA-DTA) and the specific surface area was determined by the Brunauer-Emmett-Teller (BET) method. The nanocomposites showed better photocatalytic activity than bare TiO2 due to the enhanced adsorption and the graphene property of inhibiting recombination between photogenerated electrons and holes. The composite containing 8% wt. OGn (TiO2-OGn-8%) was supported on autoclaved cellular concrete (ACC) creating a floating photocatalytic nanocomposite. This floating material was evaluated for successive cycles in the degradation of methylene blue, methyl orange and ketoprofen solutions. Although the photocatalytic activity decreased with each cycle, it is possible to reuse the nanocomposite satisfactorily and this facilitates its practical application for water treatment.

引用

页码：3215 / 3223

页数：9

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